package cn.xaut.查找表;

import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;

public class demo1 {

    public int[] twoSum(int[] nums, int target) {

        Map<Integer, Integer> map = new HashMap<>();
        for (int i = 0; i < nums.length; i ++) {
            if (map.containsKey(target - nums[i]))
                return new int[]{i, map.get(target - nums[i])};
            map.put(nums[i], i);
        }
        return null;
    }

    public static void main(String[] args) {

        System.out.println(Arrays.toString(new demo1().twoSum(new int[]{3, 2, 4}, 6)));//[1, 2]
        System.out.println(Arrays.toString(new demo1().twoSum(new int[]{2, 7, 11, 15}, 9)));//[0, 1]
    }
}
